Eocypselus vincenti is the historically established London Clay species of Eocypselus and represents an early stem member of the swift and hummingbird radiation. Like other eocypselids it retained comparatively generalised wing proportions, showing that modern apodiform flight specialisations were acquired later.

It was a small volant bird and probably fed on insects, with some degree of aerial foraging likely. The exact behaviour remains inferential. Modern work has shown that several closely similar Eocypselus species occur in the formation, so old isolated material should not automatically be assumed to be E. vincenti.